A patient with Von Hippel disease is described. The Von Hippel syndrome is a genetic disease characterized by a retinal angiomatosis and multiple tumors (renal and pancreatic sites are common). The pheochromocytoma is-on the contrary-very uncommon and the association with 2 pheochromocytomas has probably never been reported. In our case, a double pheochromocytoma (the first in 1973, the second in 1986) was present, in conjunction with a thyroid tumor and with an anomalous renal vein (circumaortic ring). The clinical picture was characterized by a severe hypertension and a fourth stage retinopathy. A correct diagnosis was established only 10 years after the clinical exordium. The thyroidectomy and the ablation of both the pheochromocytomas were necessary.
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Appl Immunohistochem Mol Morphol
January 2025
Department of Medical and Surgical Sciences and Advanced Technologies "G.F. Ingrassia," Anatomic Pathology, University of Catania.
The histologic differential diagnosis between intracranial hemangioblastoma (HB) and metastatic clear cell renal cell carcinoma may be challenging, especially considering that both tumors exhibit clear cell morphology and can be associated with vHL mutation and/or Von Hippel-Lindau syndrome. As the execution of immunohistochemical analyses is often mandatory, the expression of PAX8 has been traditionally considered a reliable marker of metastatic clear cell renal cell carcinoma, being consistently negative in intracranial HB. However, as in recent years, some cases of PAX8-positive HBs have been reported in the literature; we studied the expression of this antibody on a series of 23 intracranial HB, showing that about 40% of these tumors may express PAX8 and that this immunoreactivity is often focal and weak.
View Article and Find Full Text PDFPathol Res Pract
January 2025
Department of Orthopaedics, the second Affiliated Hospital of Wannan Medical College, Wuhu 241000, China. Electronic address:
Background: Renal hemangioblastoma (HB) is a rare extra-central nervous system (CNS) tumor, typically not linked to Von Hippel-Lindau (VHL) Syndrome, and its underlying genetic drivers and molecular mechanisms remain elusive. The objective of this study is to investigate the clinicopathological features and molecular genetic changes of primary renal hemangioblastomas.
Methods: Herein, the clinical, imaging, clinicopathological features, and immunophenotype in 3 cases of renal HB were retrospectively analyzed.
Curr Oncol Rep
January 2025
Neuroendocrine Tumour Unit, ENETS Centre of Excellence, 1st Department of Propaedeutic and Internal Medicine, Laiko Hospital, National and Kapodistrian University of Athens, Agiou Thoma 17, Athens, 11527, Greece.
Purpose Of Review: The purpose of this review is to outline the current knowledge on epidemiology, diagnosis and management of neuroendocrine neoplasms (NENs) that develop in the context of Von Hippel-Lindau (VHL) syndrome.
Recent Findings: Pancreatic NENs develop in 8-17% of VHL patients (vPNENs) and are mostly multi-focal, cystic and non-functioning. Surgical resection is recommended for vPNENS > 3 cm that exhibit higher metastatic potential or in tumors with short doubling time while in the 20% of cases with metastatic disease the HIF-2 A inhibitor belzutifan is considered a promising option.
Retin Cases Brief Rep
May 2024
Retina Vitreous Consultants.
Purpose: To demonstrate the response of a juxtapapillary retinal hemangioblastoma (JRH) to belzutifan in a patient with Von-Hippel-Lindau syndrome (VHL).
Methods: This case report includes fundus photography and optical coherence tomography to compare a juxtapapillary retinal hemangioblastoma (JRH) before and 24 months after treatment with belzutifan.
Results: An 18-year-old woman with VHL was diagnosed with a juxtapapillary retinal hemangioblastoma (JRH) at age 13.
Abdom Radiol (NY)
December 2024
Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, No.58, Second Zhongshan Road, Yuexiu District, Guangzhou, Guangdong, 510080, China.
Pancreatic neuroendocrine neoplasms (pNENs) are the second most common pancreatic malignancy. While most cases are sporadic, a small proportion is associated with genetic syndromes, such as Multiple Endocrine Neoplasia (MEN), Von Hippel-Lindau Syndrome (VHL), Neurofibromatosis Type 1 (NF1), and Tuberous Sclerosis Complex (TSC). This review aims to use pNENs as a clue to reveal the full spectrum of disease, providing a comprehensive understanding of diagnosis.
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